set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Melting points can separate materials because

a) heat causes molecules to disintegrate

b) molecules vibrate rapidly when heated

c) substances melt at different temperatures

d) many substances fuse at the melting point

Question : 2

Boyle’s law states that the

a) volume is directly proportional to the temperature at constant pressure

b) pressure of a gas is directly proportional to the temperature at constant volume

c) pressure of a gas is inversely proportional the volume at constant temperature

d) None of the above

Question : 3

Which chemical was an important symbol in our freedom struggle ?

a) Medicine

b) Glucose

c) Fertilizer

d) Sodium chloride

Question : 4

Solubility is a good separation technique for

a) different salts

b) noble gases

c) pure metals

d) metallic alloys

Question : 5

Filtration can be used to separate

a) liquids from liquids

b) liquids from solids

c) solids from solids

d) liquids from gases